Alyx \a-lyx, al-yx\ as a girl's name is a variant of Alexis (Greek), and the meaning of Alyx is "defender, protector".
The baby name Alyx sounds like Alex and Alix. Other similar baby names are Alys, Allix, Alexi, Alexa, Alyss, Alyse, Alysa, Alyce, Allys, Aliz, Alis and Alyza.